You can still use the images you have hosted at AW if you are listing directly from eBay.
Once you are in Auction Manager, click on Image Hosting and select the images you want to use. Scroll to the bottom of the page and click on Add Image. A confirmation page will appear - follow the prompt and a box of HTML will come up. Cut and paste and add to the rest of your description on your Sell your Item page. (Have 2 windows open - one at eBay, the other at AW.)
If you need any further help, the Customer Care folk will be in the Auction Manager Services Forum later this morning and will be able to assist you.